CVE-2026-89666

A flaw was found in the kernel. A remote attacker, acting as an NFSv3 client, can send malformed time values during SETATTR or create operations. This can lead to the corruption of on-disk metadata, resulting in incorrect timestamps for files. This issue affects filesystems that support nanosecon...

CVE-2026-89713

A flaw was found in the Linux kernel's Network File System Daemon NFSD. A remote attacker, by sending a crafted file attribute modification request SETATTR while a file is being concurrently appended, could exploit a time-of-check to time-of-use TOCTOU vulnerability. This could lead to the...

CVE-2026-89665

A flaw was found in the Linux kernel's nfsd component. A remote attacker could exploit this vulnerability by sending a specially crafted NFSv2 SETATTR or CREATE request with an out-of-range 'useconds' value. This could lead to incorrect timestamps being written to the filesystem, resulting in dat...

CVE-2026-89679

A flaw was found in the Linux kernel's nfsd component. A remote attacker can exploit this by sending a specially crafted SETATTR request that includes specific delegation timestamp attributes and a special NFSv4 state ID. This triggers a null dereference, leading to a kernel crash and a Denial of...

CVE-2026-89713

In the Linux kernel, the following vulnerability has been resolved: NFSD: check truncate permission under inode lock nfsdsetattr checks whether a size update needs NFSDMAYTRUNC before it takes inodelock. The comparison uses the file size sampled by that unlocked read, but the actual ATTRSIZE upda...

CVE-2026-89697

In the Linux kernel, the following vulnerability has been resolved: nfsd: add fhwantwrite for early-verified SETATTR in nfsdprocsetattr The BOTHTIMESET branch calls fhverify early so setattrprepare can inspect the dentry. This causes nfsdsetattr to skip fhwantwrite, so notifychange runs without a...

CVE-2026-89665

In the Linux kernel, the following vulnerability has been resolved: nfsd: reject out-of-range useconds in NFSv2 SETATTR/CREATE The NFSv2 sattr decoder converts the wire useconds to nanoseconds in svcxdrdecodesattr: iap-iaatime.tvnsec = tmp2 NSECPERUSEC; tmp2 is a u32 and NSECPERUSEC is 1000, so t...

CVE-2026-89697

CVE-2026-89697 affects the Linux kernel's NFS server (nfsd) . In the BOTH_TIME_SET branch of nfsd_proc_setattr(), an early call to fh_verify() causes nfsd_setattr() to skip fh_want_write(), resulting in notify_change() executing without a mount write reference . The fix adds the missing fh_want_w...

CVE-2026-89697 nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()

In the Linux kernel, the following vulnerability has been resolved: nfsd: add fhwantwrite for early-verified SETATTR in nfsdprocsetattr The BOTHTIMESET branch calls fhverify early so setattrprepare can inspect the dentry. This causes nfsdsetattr to skip fhwantwrite, so notifychange runs without a...

EUVD-2026-76609

In the Linux kernel, the following vulnerability has been resolved: nfsd: add fhwantwrite for early-verified SETATTR in nfsdprocsetattr The BOTHTIMESET branch calls fhverify early so setattrprepare can inspect the dentry. This causes nfsdsetattr to skip fhwantwrite, so notifychange runs without a...

CVE-2026-89679 nfsd: fix null dereference in nfsd4_setattr for deleg timestamp attrs

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix null dereference in nfsd4setattr for deleg timestamp attrs When a SETATTR request includes FATTR4WORD2TIMEDELEGACCESS or FATTR4WORD2TIMEDELEGMODIFY in the attribute bitmap, nfsd4setattr sets delegattrs=true and calls...

CVE-2026-89679

A null pointer dereference in the Linux kernel's NFS server (nfsd) component affects nfsd4_setattr() when handling delegation timestamp attributes. If a client sends the NFSv4 "one stateid" (all-0xFF bytes) alongside FATTR4_WORD2_TIME_DELEG_ACCESS or FATTR4_WORD2_TIME_DELEG_MODIFY in a SETATTR re...

EUVD-2026-76577

In the Linux kernel, the following vulnerability has been resolved: nfsd: reject out-of-range useconds in NFSv2 SETATTR/CREATE The NFSv2 sattr decoder converts the wire useconds to nanoseconds in svcxdrdecodesattr: iap-iaatime.tvnsec = tmp2 NSECPERUSEC; tmp2 is a u32 and NSECPERUSEC is 1000, so t...

CVE-2026-89665

CVE-2026-89665 affects the Linux kernel 's NFSv2 server (nfsd ). The vulnerability is in svcxdr_decode_sattr(), where an out-of-range useconds value (a u32) is multiplied by NSEC_PER_USEC (1000). On ILP32 (32-bit) architectures the product overflows, wrapping to a seemingly valid tv_nsec value th...

CVE-2026-89666 nfsd: reject out-of-range nseconds in NFSv3 SETATTR and create ops

In the Linux kernel, the following vulnerability has been resolved: nfsd: reject out-of-range nseconds in NFSv3 SETATTR and create ops A client can send an NFSv3 SETATTR, CREATE, MKDIR, SYMLINK or MKNOD carrying an atime or mtime whose nseconds field is out of range. The value is well-formed on t...

CVE-2026-89666

CVE-2026-89666 affects the Linux kernel's nfsd (NFS server daemon). A client can send an NFSv3 SETATTR, CREATE, MKDIR, SYMLINK, or MKNOD carrying an atime or mtime whose nseconds field is out of range —it decodes as a valid uint32 but is not a valid timespec64. Nothing in the setattr path clamps ...

PT-2026-90395

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix null dereference in nfsd4 setattr for deleg timestamp attrs When a SETATTR request includes FATTR4 WORD2 TIME DELEG ACCESS or FATTR4 WORD2 TIME DELEG MODIFY in the attribute bitmap, nfsd4 setattr sets deleg attrs=true a...

PT-2026-90413

In the Linux kernel, the following vulnerability has been resolved: nfsd: add fh want write for early-verified SETATTR in nfsd proc setattr The BOTH TIME SET branch calls fh verify early so setattr prepare can inspect the dentry. This causes nfsd setattr to skip fh want write, so notify change ru...

PT-2026-90354

In the Linux kernel, the following vulnerability has been resolved: smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions When a file has the setuid or setgid bit set and is written to, the VFS strips those bits and issues a setattr with ATTR KILL SUID/ATTR KILL...

PT-2026-90382

In the Linux kernel, the following vulnerability has been resolved: nfsd: reject out-of-range nseconds in NFSv3 SETATTR and create ops A client can send an NFSv3 SETATTR, CREATE, MKDIR, SYMLINK or MKNOD carrying an atime or mtime whose nseconds field is out of range. The value is well-formed on t...